Electrode for use in depositing molten metal and process or method of making same



UNITED STATES PATENT OFFICE.

WILLIAM HANSON BOORNE, OF LONDON, ENGLAND.

ELECTRODE FOR USE IN DEPOSITING MOLTEN METAL AND PROCESS CR METHOD OI MAKING SAME.

No Drawing.

T 0 all whom it may concern:

Be it known that I, IVILLIAM HANSON .BOORNE, M. A. I. M. E., a citizen of the United Kingdom of Great Britain and Ireland, and resident of Bush Lane House, Can non Street, London, E. C. 4, England, have invented certain new and useful Improvements in Electrodes for Use in Depositing Molten Metal and Processes or Methods of Making Same, of which the following is a specification, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to metal electrodes used for the depositing of metal by the electric arc and in particular to an improved coating for the metal rod or rods which form the core of the electrode.

Briefly, the invention may be described as consisting in winding suitable threads around the metal rod with the spirals or windings of each thread in close proximity (contact) to the adjacent windings, that is to say to wind the thread or threads closely and without gaps or spaces between thespirals, the said threads being soaked in a suitable flux either before the winding and also after the winding or after the winding only. Suitable threads are those made of either or both some carbonaceous material and asbestos. The flux composition can be applied in any convenient manner as by extrusion or similar process.

I have found that ordinary flux-coated electrodes for electric welding of metals will not readily stand transport, and the coating is liable to be damaged and chipped off, and the electrode rendered useless by accidental shocks and exposure to wet or damp.

Asbestos yarn in widely separated windings has been used as a protective coverin for electrodes, but those electrodes of this kind which I have tested have an objection, v1z:

Specification of Letters Patent.

Application filed September 27, 1920.

Patented Jan. 10, 1922. Serial No. 413,121.

They cause the deposition of a large amount of slag upon the weld, which has afterwards to be got rid of.

According to my invention, I first thoroughly soak one or more threads of preferably a carbo naceous fibre, such as cotton, ramee, in a semi-fluid flux mixture, and then wind it or them closely on the wire or rod core continuously in such a manner that the flux composition is forced upon the wire both under and over the thread, while winding is taking place, so that the thread is completely embedded and saturated with the semi-fluid composition, after which the whole 1s passed out through an orifice which smooths and removes the surplus composition.

The result is an electrode which will stand very rough usage, can be bent into any shape required for overhead or other welding, and will stand accidental shocks in transport. or in use, and exposure to the weather and damp. The thread is completely carbonized and dissipated by the action of the electric arc, forming in itself, an additional gaseous protection against the oxidation of the weld.

What I claim and ters Patent is An electrode for depositing metal by the electrical-c, comprising a metal core having a carbonaceous thread previously impregnated with a semi-fluid flux wound in close spirals about said rod, the semi-fluid flux being evenly distributed beneath the thread, between the spirals thereof and on the outer surface of the thread.

desire to secure by Let- In witness whereof I have hen. unto set my hand in presence of two witnesses.

\VILLIAM HANSON BOORNE. Witnesses:

J. W. PATCHING, W. F. WHEELER. 

